UNIDENTIFIED

SUNTAC 286-12

Processor         80286
Processor Speed   12MHz
Chip Set          Suntac
Max. Onboard DRAM 4MB
Cache             None
BIOS              AMI/Award/ERSO/Phoenix
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                    Location   Purpose                  Location

  Speaker                      J19      Turbo switch               JP4

  Power LED & keylock          J20      Turbo LED                  JP5

  External battery             J21      Reset switch               JP6

  External EMS selection       JP2

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   Internal battery switch                BS                 N/A

  »   Factory configured - do not            J18                N/A
      alter

  »   Keyboard BIOS type select              JP7             pins 2 & 3
      Award                                                    closed

      Keyboard BIOS type select              JP7             pins 1 & 2
      Phoenix                                                  closed

  »   Monitor type select color              SW1             pins 2 & 3
                                                               closed

      Monitor type select                    SW1             pins 1 & 2
      monochrome                                               closed

      EMS port address select               SW2/4               Off
      0E8H- 0EFH

      EMS port address select               SW2/4                On
      098H- 09FH

  Note: The location of JP7 is unidentified.

                            DRAM CONFIGURATION

         Size                   Bank 0                    Bank 1

        512KB                 (18) 41256                   NONE

        640KB                 (18) 41256                 (18) 4164

         1MB                  (18) 41256                (18) 41256

  640KB+EMS (384KB)           (18) 41256                (18) 41256

         2MB                 (18) 411000                   NONE

  640KB+EMS (1408KB)         (18) 411000                   NONE

         4MB                 (18) 411000                (18) 411000

  640KB+EMS (3456KB)         (18) 411000                (18) 411000

                         DRAM SWITCH CONFIGURATION

         Size               SW2/6            SW2/7             SW2/8

        512KB                On                On               On

        640KB                On                On               Off

         1MB                 On               Off               On

  640KB+EMS (384KB)          On               Off               Off

         2MB                 Off               On               On

  640KB+EMS (1408KB)         Off               On               Off

         4MB                 Off              Off               On

  640KB+EMS (3456KB)         Off              Off               Off

                          CPU SPEED CONFIGURATION

          Speed                 JP1              JP4            SW2/1

  CPU speed forced high      pins 2 & 3          N/A             Off
                               closed

  CPU speed forced low       pins 2 & 3          N/A             On
                               closed

  CPU speed forced high      pins 1 & 2        Closed            N/A
                               closed

   CPU speed selectable      pins 1 & 2         Open           Closed
       at keyboard             closed

                       I/O WAIT STATE CONFIGURATION

    Wait state            JP1                JP3               SW2/3

        4              pins 2 & 3         pins 2 & 3            On
                        closed              closed

        6              pins 2 & 3         pins 2 & 3            Off
                        closed              closed

                            BIOS CONFIGURATION

           Type                       JP9                   SW2/5

  »          27256             pins 2 & 3 closed              On

             27128             pins 1 & 2 closed             Off

    EMS TOGGLE CONFIGURATION

  Setting     JP2       SW2/8

    On       Closed      Off

    Off       Open       On